Config 2811 as a gatekeeper for VideoConf-h323

Answered Question
Jun 19th, 2008

Got a 2811 with the SipServices/h323 IOS. I need to setup the unit as a gatekeeper for 6 polycom HDX 7000 endpoints. Gk will only used for video conferencing, no Sip. Can someone point me to a sample config for the 2811 or somehting? Searching for "gatekeeper" didn't turn up anything helpful.


I have this problem too.
0 votes
Correct Answer by Brandon Buffin about 8 years 4 months ago

Take a look at the following link for basic gatekeeper concepts and configuration.

Hope this helps. If so, please rate the post.


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gsroberts Wed, 06/25/2008 - 05:42

If Brandon's links aren't enough, shoot me an email address; I'm using 2811s for core GK (and alt) and can send you my config as a starting point and/or comparison.


peter.williams@... Thu, 01/22/2009 - 15:53

Can you send me your email address so I can get that configuration. I am trying to get video conferencing working on a 2811

Tobias Gallegos... Mon, 03/23/2009 - 11:12

Hi robert

I want to configure similar scenario. can you send me your configuration of the gatekeeper???

sincerelly thanks!


Tobias Gallegos... Tue, 03/31/2009 - 11:27

Hi robert

I have two gatekeepers (MCM-cisco2621mx, with ios 12.3 jsx)

the configuration of GK is:


zone local GK

zone remote GK2 1719

zone prefix GK 226....

zone prefix GK2 5....

gw-type-prefix 1#* default-technology

lrq forward-queries no shutdown


the second gatekeeper (GK2):


zone local GK2

zone remote GK 1719

zone prefix GK 226....

zone prefix GK2 5....

lrq forward-queries

no shutdown


i have two terminals H323, one register on the GK (zone 226) and other on the GK2 zone (5)

So, when i call 2267721 or 52345 the call not connect.

I need your help please.

Sincerely thanks!!!

peter.williams@... Fri, 01/23/2009 - 11:18

Thank you for the information, I do have a question, which IOS version are you using on your 2811 router?

dmooreami Fri, 01/23/2009 - 11:30

That guide is for 12.2 IOS. 2811's run 12.4 out of the box. Commands have changed some since 12.2. you can't paste in some 12.2 gk commands directly into 12.4 from what I remember.

Can anyone tell me why is it so hard to find Cisco IOS guides? The old "Cisco Connection site" made it easy to find IOS guides. Still can't find an easy way to find all the IOS guides for IOS 12.4/12.3. What am I missing here?

techminion Fri, 01/23/2009 - 11:49

I'm running release 12.4.23, specifically c2800nm-adventerprisek9_ivs-mz.124-23.bin

Some of the commands may be different since the guide is for 12.2, however, the 'Starting a Gatekeeper' and example commands appear to be the same.

peter.williams@... Fri, 01/23/2009 - 11:54

That is the IOS that I am running, have you run into any licensing issues, from what I understnad the gatekeeper requires licenses after 12.4(20)T.

ryhicks Mon, 01/26/2009 - 15:31



int l0

ip address

h323-gateway voip int

h323-gateway voip bind srcaddr



zone local GK

zone prefix GK 205....... gw-default-priority 0

zone prefix GK 205....... gw-priority 10 polycom205

zone prefix GK 407....... gw-default-priority 0

zone prefix GK 407....... gw-priority 10 polycom407

zone prefix GK 864....... gw-default-priority 0

zone prefix GK 864....... gw-priority 10 polycom864

no shut


#show gatekeeper endpoints

#debug gatekeeper main 10

# example below no gateways to route 864 except polycom endpoint name (h323-id) polycom864.

#GK = Gatekeeper zone name.

#gatekeeper is servicing from loopback 0 address

zone prefix GK 864....... gw-default-priority 0

zone prefix GK 864....... gw-priority 10 polycom864

peter.williams@... Tue, 01/27/2009 - 12:52

Is their any gatekeeper security we can implement, so we do not have just anybody joining the gatekeeper on our network?

aherraez77 Tue, 03/24/2009 - 06:34


You can use the command:

zone subnet zonename ip_address_range enable

Only the endpoints in this range can register in the gk.

You can use AAA too.



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